10. Bill & Ted's Excellent Adventures
Produced just a year after the original film, the Bill & Ted's Excellent Adventures animated series was unique for the fact it actually featured the vocal talents of the movie’s principal cast. Keanu Reeves, Alex Winter, George Carlin and Bernie Casey all reprised their roles for the initial 13-episode run, which was produced by the iconic animation studio Hanna-Barbera.
The premise was much the same too, with the rock-n-roll-loving high school slackers travelling through time to ensure iconic moments from history played out as they should. Along the way they rubbed shoulders with major historical figures like Julius Caesar, Henry the VIII and The Wright Brothers.
Originally broadcast on CBS, the show was deemed popular enough that a second series was commissioned. However, it underwent some pretty drastic changes with the show moving to Fox Kids, where it would be produced by DIC Animation City. The original cast was replaced with lesser-known voice actors, while Bill and Ted’s time-travelling phone booth now had the capabilities to take the duo into literature, TV shows and even inside the human body.
The new format failed to catch on with audiences and the show was cancelled soon after, though the new actors would get one last go at the characters with a short-lived and similarly ill-advised live-action Bill and Ted TV series which aired in 1992 and lasted just one series.